Heat-storing attachment for radiator systems



E. SCHRANCK AND E. F. KUNKEL. HEAT STOHING ATTACHMENT FOR RADIATORSYSTEMS.

APPLICATION FILED FEB. 4, 1918.

Patented May 4, 1920.

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@nomins ZBVTARD V. SCHRNCK AND EEN/WARD F HEAT-STRNG- ATTACHMENT R-assenso.

Specication of Letters Patents Patented May 929.

Application filed February 4, 1918. Serial No. 215,09

To all whom t may com-ern Be 'it known that we, EDWARD V; SGHRANCK andEDWARD l?. KUNKEL, citizens of the United States, residing at Milwaukee,county of Milwaukee and State of Wisconsin, have invented. new anduseful improvements in Heat-Storing Attachments for Radiator' Systems,of which the following is a specification.

Our invention relates to improvements in heat-storing attachments forthe water jackets and radiator systems of motor driven vehicles.

The object of our invention is to provide means for storing up heat whenthe engine is running and utilizing such stored heat to keep the waterin the circulatory system of the motor at a moderate temperaturesufficient to prevent freezing.

More particularly, the object is to provide means whereby the heat ofthe exhaust gases may be absorbed and stored in a storage chamberprovided with steatite or any other material capable of absorbing alarge number of heat units and allowing slow radiation on account of theslow heat conductivity of the material employed.

In the drawings,"

Figure l is a side elevation of an internal combustion motor providedwith a water jacket and radiator and also equipped with our improvedheat storing apparatus.

Fig. 2 is a detail view, in vertical section, of the heat storingchamber showing its water jacket and circulatory pipe connections.

Like parts are identified by the same reference characters in bothviews.

l is the exhaust pipe of an internal combustion engine and 2 is aradiator associated with the water jacket of the engine in the ordinarymanner. When used in. connection with a motor driven vehicle, the engineis, of course., inclosed within the hood 4C.

A chamber 6 is mounted upon the exhaust pipe l, the bottom of thechamber t being preferably concave in form so as to 'snugly fit over thepipe 1. The chamber is provided with an i-nterior cavity 8 filled withsteatite. or what is commonly known as soap stone, this preferablycomprising a solid block 9. rlhis cavity 8 may be open at the bottom,whereby the block 9 may be allowed to bear directly on the exhaust pipe,the bottom of the block being hollowed out in concave form to fit thepipe. The chamber 6 also includes a water .cavity ll which is closed,except for a connection l2 with the water jacket of the internalcombustion motor and another connection 13 leading to the main hot waterpipe connection l5 of the radiator. third cavity 1T, within the chamber(5, is filled with a non-heat conducting material, such as dead air,felt. mineral wool, or any other material adapted to serve as a heatinsulator.

lt will be understood that, when the engine is running, the stone 9 willabsorb heat from the exhaust pipe l. lVlien the engine stops, a gravitycirculation will be maintained through the radiator and the enginejacket, the water thus circulating passing through the cavity 1l andabsorbing heat' from the steatite 9. As the temperature ofl the water inthe system reduces, heat will be suppliedfromthe steatite block to asufficient extent to keep the temperature above the freezing pointthrough a `considerable period of time. Assuming that the hood isproperly j acketed` as would be the case during freezing weather, it ispossible to store suiiieient heat in the block 9 to keep the water inthe system above the freezing point for ten or twelve hours duringsevere weather and for much longer periods during moderate winterweather.

The heat storing connection is preferably not included as a permanentfeature of the circulatory s vstem of the engine, but is adapted fordetachable connection therewith by the fittings l2 and 13 by whichconnection is made with the main line pipe or duct l5. thus allowing thewater to pass either through the water heating cavity ll or through themain line duct l5.

In warm weather'. the connections l2 and 13 may be removed and theopenings in the fittings l2 and 13 capped. The entire casting. composedof the soap stone 9, water chamber ll, and the outer chamber 17 may beremoved.

ln cases where the engine is to lie idle in a cold place for a period oftimue considerably in excess of that in which the steatite is capable ofimparting warmth to the water, we may provide an electrical heating unitor plug 22. which may be inserted 'through the wall of the chamber intothe water cavity.or into a socket in the steatite. The heating unit maybeconnected with a source of electrical energy through wires 23.

`We do not wish to limit the scope of our invention to steatite, as anymaterial capable of absorbing a large number of heat units may besubstituted therefor without departing from the invention hereindescribed.

It will be understood that the gravity circulation through the watercavity of my improved attachment will be slow and the heat absorptionfrom-the block of steatite will also be slow, since the steatite is notin direct contact with the water. Since the rate of heat loss is reducedin proportion as the temperature of the radiator and engine bodyapproximates that of the surrounding. atmosphere, it will readily beunderstood that the water in the radiator, water acket and the cavity l1will be kept above the freezing point for la considerable time,depending largely upon the nature of the weather, and that the warmthimparted to the water by the block of steatite will be transmitted toall parts of the system by the slowly moving currents of water,thusvalso aiding starting operations of the engine.

We claim l. A heat storing attachment for water jacketed internalcombustion engines, comprising the combination with said water jacketand connections, of a chamber through which the water may circulate, anda blockof steatitic material associated with said chamber and adapted toabsorb heat when the engine is in operation and to give up heat to thesurrounding water when the engine is at rest.

2. A heat storing attachment for internal combustion engines having awater circula-` tory system, com arising the combination of a block ofheat, a sorbing material, a water jacket surrounding the block, aninclosing layer of non-heat conducting material, and pipe connectionswith the circulatory system adapted to allow water to circulate throughsaid'water jacket.

3. A heat storing attachment for internal combustion engines having awater circulatory system, comprising the combination of a water chamberhaving detachable inlet and outlet connections with the circulatorysystem, a block of material inclosed by said chamber adapted to retainheat obtained from the engine when running, and impart heat to the waterwhen the engine is stopped, and an auxiliary` connection around saidwater chamber, said block and water chamber being made detachable,whereby the same may be removed when desired.

4. The combination of a water jacketed internal combustion engine, of aradiator connected with said watenjacket, an auX- iliary heat storingchamber provided with a non-heat conducting covering, and means forslowly transmitting heat therefrom to the water in the radiator andengine acket.

5. The combination withv a water jacketed internal combustion engineprovided with an exhaust pipe, of a radiator con nected for watercirculation from the water jacket, a block of heat absorbing materialmounted on the exhaust pipe, a heat insulating covering therefor, andmeans for slowly transmitting heat from said block of heat absorbingmaterial to the water in the ra* diator and engine jacket.

6. The'combination with a water jacketed internal combustion engineprovided with an exhaust pipe, of a radiator connected for watercirculation from the water jacket, a

block of heat absorbing material mounted on the exhaust pipe, a heatinsulating covering therefor, and means for slowly transmitting heatfrom said block of heat absorbing material o the water in the radiatorand engine jacket, omprising a water chamber partially inclosing saidblock of heat absorbing material, and connections adapted to permitwater circulation between said chamber and the radiator.

In testimony whereof we affix our signatures in the presence of twowitnesses.

EDWARD V. SCHRANCK. EDWARD F. KUNKEL. Witnesses:

FREDERICK W. NoL'rE, ALICE J. MCKERIHAN.

